Effect of light-curing distance and curing time on composite microflexural strength
In: Dental Materials Journal, Jg. 40 (2021-01-25), S. 202-208
Online
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Zugriff:
This study investigated the influence of curing distance on µ-flexural strength (µ-FS) of a nano-hybrid composite, cured using the manufacturer-recommended curing time (MCT), compared to a consistent radiant exposure (CRE) using three different light-curing units (LCUs). Beams (6×2×1 mm) were cured using the MCT or CRE with a quartz-tungsten-halogen (QTH); a single-emission-peak light-emitting-diode (SLED), or a multiple-emission-peak light-emitting-diode (MLED) LCU. Specimens were cured at 0-, 2- or 8-mm distances (n=10) and the bottom irradiance and CRE were measured using a Managing Accurate Resin Curing-Resin Calibrator spectrometer. µ-FS testing was performed, and data analyzed using two-way ANOVA and Tukey multiple comparison tests (α=0.05). Mean bottom irradiance was (25.4-99.7 mW/cm2) and CRE (0.31-1.11 J/cm2). µ-FS was 422.1-516.6 MPa (MCT) and 440.4-490.4 MPa (CRE). Comparing CRE to MCT showed that µ-FS significantly decreased using the CRE at 2-mm (QTH) or the MCT at 2- and 8-mm (SLED). µ-FS may be significantly impacted by the curing protocol.
Titel: |
Effect of light-curing distance and curing time on composite microflexural strength
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Autor/in / Beteiligte Person: | Platt, Jeffrey A. ; Afnan O Al-Zain |
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Zeitschrift: | Dental Materials Journal, Jg. 40 (2021-01-25), S. 202-208 |
Veröffentlichung: | Japanese Society for Dental Materials and Devices, 2021 |
Medientyp: | unknown |
ISSN: | 1881-1361 (print) ; 0287-4547 (print) |
DOI: | 10.4012/dmj.2020-002 |
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